Miami Vice The Adventure Part I (1992)(Matthias Klein)

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Sep 24, 2013
09/13

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Matthias Klein

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We analyze theories in which a supersymmetric sector is coupled to a supersymmetry-breaking sector described by a non-linear realization. We show how to consistently couple N=1 supersymmetric matter to non-supersymmetric matter in such a way that all interactions are invariant under non-linear supersymmetry transformations. We extend this formalism to couple N=2 supersymmetric matter to N=1 superfields that lack N=2 partners but transform in a non-linear representation of the N=2 algebra. In...

Source: http://arxiv.org/abs/hep-th/0205300v3

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Sep 23, 2013
09/13

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Matthias Klein

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In this talk I review and generalize an idea of Seiberg that an N=1 supersymmetric gauge theory shows confinement without breaking of chiral symmetry when the gauge symmetry of its magnetic dual is completely broken by the Higgs effect. It is shown how the confining spectrum of a supersymmetric gauge theory can easily be derived when a magnetic dual is known and this method is applied to many models containing fields in second rank tensor representations and an appropriate tree-level...

Source: http://arxiv.org/abs/hep-th/9904210v1

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Oct 19, 2008
10/08

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Matthias Klein

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Book digitized by Google and uploaded to the Internet Archive by user tpb.

Source: http://books.google.com/books?id=6WALAAAAIAAJ&oe=UTF-8

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Sep 19, 2013
09/13

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Matthias Klein

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We analyze the transmission of supersymmetry breaking in brane-world models of pseudo-supersymmetry. In these models two branes preserve different halves of the bulk supersymmetry. Thus supersymmetry is broken although each sector of the model is supersymmetric when considered separately. The world-volume theory on one brane feels the breakdown of supersymmetry only through two-loop interactions involving a coupling to fields from the other brane. In a 5D toy model with bulk vectors, we compute...

Source: http://arxiv.org/abs/hep-th/0209206v2

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Sep 19, 2013
09/13

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Matthias Klein

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I discuss effective field theories of brane-world models where different sectors break different halves of the extended bulk supersymmetry. It is shown how to consistently couple N=2 supersymmetric matter to N=1 superfields that lack N=2 partners but transform in a non-linear representation of the N=2 algebra. In particular, I explain how to couple an N=2 vector to N=1 chiral fields such that the second supersymmetry is non-linearly realized. This method is then used to study systems where...

Source: http://arxiv.org/abs/hep-th/0209207v1

Indiana Jones Jaeger des verlorenen Schatzes (1993)(Matthias Klein)(de)(PD)

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Jul 20, 2013
07/13

by
Matthias Klein

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It has been proposed that gauge and Kaehler anomalies in four-dimensional type IIB orientifolds are cancelled by a generalized Green-Schwarz mechanism involving exchange of twisted RR-fields. We explain how this can be understood using the well-known duality between linear and chiral multiplets. We find that all the twisted fields associated to the N=1 sectors and some of the fields associated to the N=2 sectors reside in linear multiplets. But there are no linear multiplets associated to...

Source: http://arxiv.org/abs/hep-th/9910143v2

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Sep 19, 2013
09/13

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Matthias Klein

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We expand on an idea of Seiberg that an N=1 supersymmetric gauge theory shows confinement without breaking of chiral symmetry when the gauge symmetry of its magnetic dual is completely broken by the Higgs effect. This has recently been applied to some models involving tensor fields and an appropriate tree-level superpotential. We show how the confining spectrum of a supersymmetric gauge theory can easily be derived when a magnetic dual is known and we determine it explicitly for many models...

Source: http://arxiv.org/abs/hep-th/9812155v1

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Sep 18, 2013
09/13

by
Matthias Klein; Raul Rabadan

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We discuss compact four-dimensional Z_N x Z_M type IIB orientifolds. We take a systematic approach to classify the possible models and construct them explicitely. The supersymmetric orientifolds of this type have already been constructed some time ago. We find that there exist several consistent orientifolds for each of the discrete groups Z_2 x Z_2, Z_2 x Z_4, Z_4 x Z_4, Z_2 x Z_6, Z_2 x Z_6' and Z_6 x Z_6 if anti-D5-branes are introduced. Supersymmetry is broken by the open strings ending on...

Source: http://arxiv.org/abs/hep-th/0008173v2

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Sep 22, 2013
09/13

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Matthias Klein; Jan Louis

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In this paper we discuss the singularities in the Yukawa and gauge couplings of N=1 compactifications of the SO(32) heterotic string in four space-time dimensions. Such singularities can arise from the strong coupling dynamics of a confined non-perturbative gauge group.

Source: http://arxiv.org/abs/hep-th/9707212v1

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Sep 18, 2013
09/13

by
Matthias Klein; Jan Louis

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In this paper we discuss quantum modified moduli spaces in supergravity. We examine a model suggested by Izawa and Yanagida and by Intriligator and Thomas that breaks global supersymmetry by a quantum deformation of the classical moduli space. We determine the minimum of the supergravity potential when the gauge coupling is taken to depend on a dynamical field, typically a modulus of string theory. We find that the only minimum is at the trivial configuration of vanishing coupling constant and...

Source: http://arxiv.org/abs/hep-th/9803143v1

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Sep 17, 2013
09/13

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Matthias Klein; Raul Rabadan

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We construct compact type IIB orientifolds with discrete groups Z_4, Z_6, Z_6', Z_8, Z_12 and Z_12'. These models are N=1 supersymmetric in D=4 and have vector structure. The possibility of having vector structure in Z_N orientifolds with even N arises due to an alternative Omega-projection in the twisted sectors. Some of the models without vector structure are known to be inconsistent because of uncancelled tadpoles. We show that vector structure leads to a sign flip in the twisted Klein...

Source: http://arxiv.org/abs/hep-th/0007087v2

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Sep 22, 2013
09/13

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Matthias Klein; Jan Louis

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Singularities in the Yukawa and gauge couplings of N=1 compactifications of the SO(32) heterotic string are discussed.

Source: http://arxiv.org/abs/hep-th/9707047v2

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Sep 22, 2013
09/13

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Matthias Klein; Sang-Jin Sin

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We derive the effective superpotential for an N=1 SU(N_c) gauge theory with one massless adjoint field and N_f massless fundamental flavors and cubic tree-level superpotential for the adjoint field. This is a generalization of the Affleck-Dine-Seiberg superpotential to gauge theories with one massless adjoint matter field. Using Kutasov's generalization of Seiberg duality, we then find the effective superpotential for a related theory with massive fundamental flavors.

Source: http://arxiv.org/abs/hep-th/0309044v1

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Sep 22, 2013
09/13

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Matthias Klein; Sang-Jin Sin

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We study the duality of $\cN=1$ gauge theories in the presence of a massless adjoint field and massive quarks by calculating the superpotential using the Dighkgraaf-Vafa matrix model and by comparing with the previous result coming from Kutasov duality. The Kutasov duality method gives a result in which one instanton term is absent. The matrix model method confirms it and also show that the absence of the one instanton term is related to the masslessness of the adjoint field.

Source: http://arxiv.org/abs/hep-th/0310078v2

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Sep 18, 2013
09/13

by
Anamaria Font; Matthias Klein; Fernando Quevedo

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Recent understanding of {\cal N}=1* supersymmetric theory (mass deformed {\cal N}=4) has made it possible to find an exact superpotential which encodes the properties of the different phases of the theory. We consider this superpotential as an illustrative example for the source of a nontrivial scalar potential for the string theory dilaton and study its properties. The superpotential is characterized by the rank of the corresponding gauge group (N) and integers p,q,k labelling the different...

Source: http://arxiv.org/abs/hep-th/0101186v3

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Sep 21, 2013
09/13

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Yu-Ying Zhang; Miguel Verdugo; Matthias Klein; Peter Schneider

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We studied one of the most X-ray luminous cluster of galaxies in the REFLEX survey, RXC J1504.1-0248 (hereafter R1504; z=0.2153), using XMM-Newton X-ray imaging spectroscopy, VLT/VIMOS optical spectroscopy, and WFI optical imaging. The mass distributions were determined using both the so-called hydrostatic method with X-ray imaging spectroscopy and the dynamical method with optical spectroscopy, respectively, which yield M^{H.E.}_{500}=(5.81+/-0.49)*1.e14Msun and...

Source: http://arxiv.org/abs/1204.2759v2

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Jun 29, 2018
06/18

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Andreas Rabitz; Yu-Ying Zhang; Axel Schwope; Miguel Verdugo; Thomas H. Reiprich; Matthias Klein

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Context: The galaxy cluster Abell S1101 (S1101 hereafter) deviates significantly from the X-ray luminosity versus velocity dispersion relation (L-sigma) of galaxy clusters in our previous study. Given reliable X-ray luminosity measurement combining XMM-Newton and ROSAT, this could most likely be caused by the bias in the velocity dispersion due to interlopers and low member statistic in the previous sample of member galaxies, which was solely based on 20 galaxy redshifts drawn from the...

Topics: Astrophysics, Cosmology and Nongalactic Astrophysics, Astrophysics of Galaxies

Source: http://arxiv.org/abs/1608.07417

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Jun 28, 2018
06/18

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Dominique Eckert; Mathilde Jauzac; HuanYuan Shan; Jean-Paul Kneib; Thomas Erben; Holger Israel; Eric Jullo; Matthias Klein; Richard Massey; Johan Richard; Celine Tchernin

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Observations of the cosmic microwave background indicate that baryons account for 5% of the Universe's total energy content. In the local Universe, the census of all observed baryons falls short of this estimate by a factor of two. Cosmological simulations indicate that the missing baryons might not have condensed into virialized haloes, but reside throughout the filaments of the cosmic web (where matter density is larger than average) as a low-density plasma at temperatures of $10^5-10^7$...

Topics: Cosmology and Nongalactic Astrophysics, Astrophysics, Astrophysics of Galaxies, High Energy...

Source: http://arxiv.org/abs/1512.00454